gh the angular points of a triangle, straight lines bedrawn parallel to the opposite sides, the triangle so formed has itssides double the sides of the original triangle, and its angles equal tothose of the original triangle. Hence show (Ex. 2, p. 59) that lines through the angularpoints of a… … Let ABCD, EBCF be two tlie same base BC, and between the same ||« AF, BC. Then these H* are equal in area.In As EAB, FDC,AB = DC, being opp. sides of a ||, (II., 5.)int. ZEAB^ext. £ FDC, (In., § 29.)ext. LAEB^iut. _DFC; .-. aEAB:-aFDC; (I., 7.).-. fig. ABCF less AFDC = fig. ABCF less AEAB;that is…
Geometry · Geometry, Plane
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